Pub Date : 2020-08-31DOI: 10.14773/CST.2020.19.4.211
M. G. Kim, B. Lim, K. T. Kim, H. Chang, Heung-Bae Park, Young-Sik Kim, 김민기, 임부택, 김기태, 장현영, 박흥배, 김영식
The external corrosion of buried piping can be controlled using both coating and cathodic protection. Several factors are involved in the damage and deterioration of the coating on pipes. There are many detection methods for coating defects on pipes and the direct current voltage gradient (DCVG) method is one of the most powerful methods. However, the detection reliability of DCVG can be affected by interferences such as stray current, metal objects connected to rectifiers, and copper grids. Therefore, this study focused on the interference effects of rectifiers and a copper grid on the reliability of coating flaw detection. As the length of the interference pipe connected to the rectifier increased, the reliability decreased. In contrast, as the distance between the pipe and the copper grid increased, the reliability of the coating flaw detection increased. The detection results produced by the DCVG method were discussed using current and potential simulations for a pipe with a rectifier and copper grid interference in the soil.
{"title":"Effects of Rectifier and Copper Grid Interference on the Detection Reliability of Coating Flaws on Buried Pipes, 매설 배관 피복 결함 탐상 정확도에 미치는 인접 정류기 및 접지 구리망 간섭의 영향","authors":"M. G. Kim, B. Lim, K. T. Kim, H. Chang, Heung-Bae Park, Young-Sik Kim, 김민기, 임부택, 김기태, 장현영, 박흥배, 김영식","doi":"10.14773/CST.2020.19.4.211","DOIUrl":"https://doi.org/10.14773/CST.2020.19.4.211","url":null,"abstract":"The external corrosion of buried piping can be controlled using both coating and cathodic protection. Several factors are involved in the damage and deterioration of the coating on pipes. There are many detection methods for coating defects on pipes and the direct current voltage gradient (DCVG) method is one of the most powerful methods. However, the detection reliability of DCVG can be affected by interferences such as stray current, metal objects connected to rectifiers, and copper grids. Therefore, this study focused on the interference effects of rectifiers and a copper grid on the reliability of coating flaw detection. As the length of the interference pipe connected to the rectifier increased, the reliability decreased. In contrast, as the distance between the pipe and the copper grid increased, the reliability of the coating flaw detection increased. The detection results produced by the DCVG method were discussed using current and potential simulations for a pipe with a rectifier and copper grid interference in the soil.","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"211-223"},"PeriodicalIF":0.6,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47297756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-30DOI: 10.14773/CST.2020.19.3.138
D. Ha, Y. Lim, Dongjun Kim, 하동욱, 임연수, 김동진
{"title":"Effects of Surface Deformation on Intergranular Oxidation of Alloy 600, Alloy 600의 결정립계 산화에 대한 표면 변형의 영향","authors":"D. Ha, Y. Lim, Dongjun Kim, 하동욱, 임연수, 김동진","doi":"10.14773/CST.2020.19.3.138","DOIUrl":"https://doi.org/10.14773/CST.2020.19.3.138","url":null,"abstract":"","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"138-145"},"PeriodicalIF":0.6,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41734118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-30DOI: 10.14773/CST.2020.19.3.156
Y. Oh, D. Seo, Jae-Bong Lee, 오유수, 서동일, 이재봉
{"title":"Effect of Delayed Oxygen Evolution in Anodic Polarization on the Passive Film Characteristic and Localized Corrosion Resistance of Titanium Alloys","authors":"Y. Oh, D. Seo, Jae-Bong Lee, 오유수, 서동일, 이재봉","doi":"10.14773/CST.2020.19.3.156","DOIUrl":"https://doi.org/10.14773/CST.2020.19.3.156","url":null,"abstract":"","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"156-162"},"PeriodicalIF":0.6,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47820367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-30DOI: 10.14773/CST.2020.19.3.E1
S. Suh, Youngjoon Suh, Jonghyuk Lee, H. Kwon
{"title":"Erratum to: Inhibition of Pitting Corrosion Failure of Copper Tubes in Wet Sprinkler Systems","authors":"S. Suh, Youngjoon Suh, Jonghyuk Lee, H. Kwon","doi":"10.14773/CST.2020.19.3.E1","DOIUrl":"https://doi.org/10.14773/CST.2020.19.3.E1","url":null,"abstract":"","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":" ","pages":"0-0"},"PeriodicalIF":0.6,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47095158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-30DOI: 10.14773/CST.2020.19.3.131
K. Hwang, Hun Yun, Hyukki Seo, E. Jung, K. Kim, Dongjun Kim, 황경모, 윤훈, 서혁기, 정의제, 김경모, 김동진
{"title":"Comparison Between FAC Analysis Result Using ToSPACE Program and Experimental Result, ToSPACE 프로그램을 이용한 FAC 해석결과와 실험결과 비교","authors":"K. Hwang, Hun Yun, Hyukki Seo, E. Jung, K. Kim, Dongjun Kim, 황경모, 윤훈, 서혁기, 정의제, 김경모, 김동진","doi":"10.14773/CST.2020.19.3.131","DOIUrl":"https://doi.org/10.14773/CST.2020.19.3.131","url":null,"abstract":"","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"131-137"},"PeriodicalIF":0.6,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42413515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-30DOI: 10.14773/CST.2020.19.3.122
You Sub Kim, Hobyung Chae, W. Kim, Joon Cheol Jeong, Heesan Kim, Jung-Gu Kim, Soo Yeol Lee, 김유섭, 채호병, 김우철, 정준철, 김희산, 김정구, 이수열
In this study, a corrosion failure analysis of a heat transport pipe was conducted, as the result of a pinhole leak. Interestingly, the corrosion damage occurred externally in the pipeline, resulting in severe thickness reduction near the seam line. Also, while a stable magnetite protective film formed on the inner surface, the manganese oxide formation occurred only on the outer surface. The interior and exterior of the pipe were composed of ferrite and pearlite. The large manganese sulfide and alumina inclusions were found near the seam line. In addition, the manganese sulfide inclusions resulted in grooving corrosion, which progressed in the seam line leading to the reduction in the thickness, followed by the exposure of the alumina in the matrix to the outer surface. To note, the corrosion was accelerated by pits generated from the boundaries separating the inclusions from the matrix, which resulted in pinhole leaks and water loss.
{"title":"Failure Analysis on Localized Corrosion of Heat Transport Pipe in District Heating System, 지역난방 열수송관 국부 부식 파손 분석","authors":"You Sub Kim, Hobyung Chae, W. Kim, Joon Cheol Jeong, Heesan Kim, Jung-Gu Kim, Soo Yeol Lee, 김유섭, 채호병, 김우철, 정준철, 김희산, 김정구, 이수열","doi":"10.14773/CST.2020.19.3.122","DOIUrl":"https://doi.org/10.14773/CST.2020.19.3.122","url":null,"abstract":"In this study, a corrosion failure analysis of a heat transport pipe was conducted, as the result of a pinhole leak. Interestingly, the corrosion damage occurred externally in the pipeline, resulting in severe thickness reduction near the seam line. Also, while a stable magnetite protective film formed on the inner surface, the manganese oxide formation occurred only on the outer surface. The interior and exterior of the pipe were composed of ferrite and pearlite. The large manganese sulfide and alumina inclusions were found near the seam line. In addition, the manganese sulfide inclusions resulted in grooving corrosion, which progressed in the seam line leading to the reduction in the thickness, followed by the exposure of the alumina in the matrix to the outer surface. To note, the corrosion was accelerated by pits generated from the boundaries separating the inclusions from the matrix, which resulted in pinhole leaks and water loss.","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"122-130"},"PeriodicalIF":0.6,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43622718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-30DOI: 10.14773/CST.2020.19.3.146
G. Jeong, In-Sung Lee, S. Kim, 정규석, 이인성, 김순태
{"title":"Effects of Heat Inputs on Phase Transformation and Resistance to Intergranular Corrosion of F316 Austenitic Stainless Steel, F316 오스테나이트 스테인리스강의 상변태 및 입계부식저항성에 미치는 입열의 영향","authors":"G. Jeong, In-Sung Lee, S. Kim, 정규석, 이인성, 김순태","doi":"10.14773/CST.2020.19.3.146","DOIUrl":"https://doi.org/10.14773/CST.2020.19.3.146","url":null,"abstract":"","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"146-155"},"PeriodicalIF":0.6,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66633202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-30DOI: 10.14773/CST.2020.19.2.82
T. Nguyen, Boi An Tran, K. Vu, A. S. Nguyen, A. T. Trinh, G. V. Pham, Thi Xuan Hang To, T. Phan
This work examined the corrosion protection performance of benzoate loaded hydrotalcite/graphene oxide (HT/GO-BZ) for carbon steel. HT/GO-BZ was fabricated by the co-precipitation method and characterized by infrared spectroscopy, X-ray diffraction, and scanning electronic microscopy. The corrosion inhibition action of HT/GO-BZ on carbon steel in 0.1 M NaCl solution was evaluated by electrochemical measurements. The benzoate content in HT/GO-BZ was determined by UV-Vis spectroscopy. Subsequently, the effect of HT/GO-BZ on the corrosion resistance of the water-based epoxy coating was investigated by the salt spray test. The obtained results demonstrated the intercalation of benzoate and GO in the hydrotalcite structure. The benzoate content in HT/GO-BZ was about 16%. The polarization curves of the carbon steel electrode revealed anodic corrosion inhibition activity of HT/GO-BZ and the inhibition efficiency was about 95.2% at a concentration of 3g/L. The GO present in HT/GO-BZ enhanced the inhibition effect of HT-BZ. The presence of HT/GO-BZ improved the corrosion resistance of the waterborne epoxy coating.
{"title":"Synthesis and Characterization of Hydrotalcite/Graphene Oxide Containing Benzoate for Corrosion Protection of Carbon Steel","authors":"T. Nguyen, Boi An Tran, K. Vu, A. S. Nguyen, A. T. Trinh, G. V. Pham, Thi Xuan Hang To, T. Phan","doi":"10.14773/CST.2020.19.2.82","DOIUrl":"https://doi.org/10.14773/CST.2020.19.2.82","url":null,"abstract":"This work examined the corrosion protection performance of benzoate loaded hydrotalcite/graphene oxide (HT/GO-BZ) for carbon steel. HT/GO-BZ was fabricated by the co-precipitation method and characterized by infrared spectroscopy, X-ray diffraction, and scanning electronic microscopy. The corrosion inhibition action of HT/GO-BZ on carbon steel in 0.1 M NaCl solution was evaluated by electrochemical measurements. The benzoate content in HT/GO-BZ was determined by UV-Vis spectroscopy. Subsequently, the effect of HT/GO-BZ on the corrosion resistance of the water-based epoxy coating was investigated by the salt spray test. The obtained results demonstrated the intercalation of benzoate and GO in the hydrotalcite structure. The benzoate content in HT/GO-BZ was about 16%. The polarization curves of the carbon steel electrode revealed anodic corrosion inhibition activity of HT/GO-BZ and the inhibition efficiency was about 95.2% at a concentration of 3g/L. The GO present in HT/GO-BZ enhanced the inhibition effect of HT-BZ. The presence of HT/GO-BZ improved the corrosion resistance of the waterborne epoxy coating.","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"82-88"},"PeriodicalIF":0.6,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45806267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-30DOI: 10.14773/CST.2020.19.2.100
Jin-seong Park, S. Ryu, Y. Jeong, Sung Jin Kim, 박진성, 류승민, 정영재, 김성진
{"title":"Effect of Oxide Particles Addition to Powder Coating on Corrosion Resistance of Steel Used as Marine Equipments, 조선･해양 기자재용 강재의 내식성에 미치는 분체도장 중 산화물 첨가의 영향","authors":"Jin-seong Park, S. Ryu, Y. Jeong, Sung Jin Kim, 박진성, 류승민, 정영재, 김성진","doi":"10.14773/CST.2020.19.2.100","DOIUrl":"https://doi.org/10.14773/CST.2020.19.2.100","url":null,"abstract":"","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"100-107"},"PeriodicalIF":0.6,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42249082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-30DOI: 10.14773/CST.2020.19.2.66
Fangwei Luo, R. Ran, Lei Wang
In this paper, the author''s team has carried out a comparative experimental study on the corrosion characteristics of Q235 steel commonly used in large-scale storage tanks under the specific bottom water environment found with Russian and Daqing crude oil. It was found that there is a certain degree of uniform or local corrosion on the tank floor depending on the kind of bottom water. The bottom water corrosion of Daqing crude oil is a uniform corrosion caused by carbon dioxide. While the Russian crude oil bottom water corrosion is clearly local corrosion caused by co-corrosion of carbon dioxide and hydrogen sulfide, here the corrosion rate is obviously higher than that caused by Daqing crude oil. There are two modes of storage tank inspection and maintenance that have been currently adopted by Chinese refining and chemical enterprises: a regular inspection mode and a API581-2016 risk-based detection mode. These modes have been effectively combined to form an intelligent tank inspection and maintenance mode, software tools to support this intelligent inspection and maintenance management have been developed.
{"title":"Study on Corrosion Law of Large Crude Oil Storage Tank Floor and Risk-Based Inspection and Maintenance Technology","authors":"Fangwei Luo, R. Ran, Lei Wang","doi":"10.14773/CST.2020.19.2.66","DOIUrl":"https://doi.org/10.14773/CST.2020.19.2.66","url":null,"abstract":"In this paper, the author''s team has carried out a comparative experimental study on the corrosion characteristics of Q235 steel commonly used in large-scale storage tanks under the specific bottom water environment found with Russian and Daqing crude oil. It was found that there is a certain degree of uniform or local corrosion on the tank floor depending on the kind of bottom water. The bottom water corrosion of Daqing crude oil is a uniform corrosion caused by carbon dioxide. While the Russian crude oil bottom water corrosion is clearly local corrosion caused by co-corrosion of carbon dioxide and hydrogen sulfide, here the corrosion rate is obviously higher than that caused by Daqing crude oil. There are two modes of storage tank inspection and maintenance that have been currently adopted by Chinese refining and chemical enterprises: a regular inspection mode and a API581-2016 risk-based detection mode. These modes have been effectively combined to form an intelligent tank inspection and maintenance mode, software tools to support this intelligent inspection and maintenance management have been developed.","PeriodicalId":43201,"journal":{"name":"Corrosion Science and Technology-Korea","volume":"19 1","pages":"66-74"},"PeriodicalIF":0.6,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48557939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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